Backside Torsion Loading for PCB IC Support Under Tight Space
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Solution Overview
Problem
Existing electronic device manufacturing processes face challenges in securely and efficiently supporting internal hardware components like CPUs and GPUs during assembly, particularly due to space constraints and the need for robust mechanical loads to compress ICs over sockets.
Innovation Solution
The development of innovative IC carriers and retention mechanisms that allow for topside insertion of ICs, utilizing thinner support features and robust retention clips, along with the integration of torsion loading mechanisms in PCB supports to enhance mechanical and thermal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional PCB support structures are used, then structural support is provided, but they occupy excessive space and cannot provide sufficient mechanical load compression
Solution Approach 1:
The patent moves the loading mechanism from the traditional topside approach to the backside of the PCB, utilizing the z-dimension (depth) rather than expanding in the x-y plane. The torsion wires extend vertically from the backside, allowing load application without increasing footprint area.
Solution Approach 2:
The patent employs thin torsion wires (0.5mm to 2mm diameter) that provide flexible yet strong mechanical loading. These thin-wire torsion elements deliver substantial compressive force while occupying minimal space, resolving the contradiction between force generation and space consumption.
2Strength
If thicker support features are used to provide robust mechanical support, then structural strength is improved, but the device height increases and space is consumed
Solution Approach 1:
The support mechanism is repositioned to the backside of the PCB, allowing the torsion wires to extend vertically upward through the PCB thickness rather than requiring lateral expansion. This dimensional repositioning provides strong support without increasing device height or footprint.
Solution Approach 2:
The patent changes the structural parameters by using high-strength torsion wires with optimized diameters (0.5mm to 2mm) and lengths, achieving robust mechanical support with minimal dimensional footprint. The torsion wire material and geometry are selected to maximize strength-to-size ratio.
3Productivity
If manual assembly processes are used for IC installation, then flexibility is maintained, but productivity is reduced and inventory management complexity increases
Solution Approach 1:
The ICs are pre-installed onto the PCB during the PCB manufacturing process itself, rather than being installed manually later. This preliminary action integrates the IC mounting into the standard PCB fabrication workflow, dramatically increasing productivity and eliminating the need for separate manual assembly steps and associated inventory management.
Solution Approach 2:
The PCB support structure with backside torsion wires is designed to be self-contained and self-aligning, allowing ICs to be automatically positioned and secured during PCB assembly without requiring manual intervention or complex external tooling. The torsion wires provide automatic mechanical engagement and compression.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
These solutions enable secure, efficient, and adaptable support for internal hardware within restrictive physical areas, improving signal integrity, thermal performance, and reducing the need for manual assembly and inventory management.
Implementation Method 1
The torsion loading mechanism may include a torsion wire coupled to the frame. In some examples, the torsion wire may be pre-loaded to deflect the frame and position the load studs against the component.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
Systems, apparatus, articles of manufacture, and methods are disclosed for supports for internal hardware of electronic devices. An example support includes an integrated circuit (IC) carrier that includes a plurality of walls, supports carried by the walls to support an IC from below the IC, and a retention clip to secure the IC.